Scraper bowl construction



NOV. 8, 1932.. V c, Q 1,886,780

SCRAPER BOWL CONSTRUCTION Filed June 27, 1931 2 Sheets-Sheet 1 X P X Ql Q sass;

ATTORNEY Nov. 8, 1932. 'c. E. BALL SCRAPER BOWL CONSTRUCTION Fileq June 27, 1931 2 SheetsSheet 2 INVENTOR C EB-(Ill BY Q..-. 51.5 M

ATTORNEY Patented Nov. '8, 1932 UNITED STATES GHAIBLEES E. BALL, OF CHICAGO, ILLINOIS,

ASSIGNOR '10 BALL WAGON GBAJDEB 160..

A CORPORATION scaarnn nowr.

CONSTRUCTION Application filed June 27, 1931. Serial No. 547,306.

This invention relates to scrapers and particularly to one of that character in which the bowl is suspended in a wheel supported frame and is adapted to be up-ended atthe front so that it may dump from its rear end.

The present invention deals with the constructional features of the bowl itself, and especially represents improvements in various respects over the bowl shown in Patent No. 1,785,106, dated December 16, 1930, as will be clearly apparent from a perusal of the description now to follow:

In the drawings'similar characters of reference indicate corresponding parts in theseveral views:

Fig. 1 is a side elevation of the improved bowl as mounted in connection with a supporting frame and in a digging position; the near side members of the frame being re-, moved.

Fig. 2 is a sectional elevation of the bowl as raised to a dumping position. v

Fig. 3 is a fragmentary vertical section of the reversible blade and its mounting means.

Fig. 4 is a fragmentary cross section on the line 4-4 of Fig. 1.

Fig. 5 is a view similar to Fig. 3 showing a removable scarificr tooth associated with the blade.

30 Referring now more'particularly to the characters of reference on the drawings, the supporting structure of the scraper comprises a suitable frame work indicated generally at 1 and mounted on wheels or endless tracks 2. The bowl comprises a bottom plate 3, side plates 4 and a rear end-gate 5. The bottom plate at the back is reinforced by a cross beam 6 thereon, from which a relatively short plate 7 slopes down and forward to a junc-- tion with the plate 3 as shown in Fig. 2. The bottom plate at the front'is reinforced by a cross bar 8 disposed. thereunder and permanently secured thereto and projecting forwardly from the same as shown in Fig. '3.

This arrangement has considerable merit. The bottom of the bowl is stiffened by the cross beam, while the additional plate 7 which extends over said beam and issecured thereto and to the .bottom plate ahead of the beam, not only provides a smooth surface over which the dirt may slide without catching against the beam, but aids in stifiening the bowl at'its rear end on account of the A or wedge-like form which the parts make with each other.

A reversible blade 9 is disposed under and projects ahead of the bar 8, being removably secured thereto b bolts 10 disposed ahead of the plate 3. I desired scarifier teeth 11 may be mounted in connection with the blade. These'teeth are provided with slots 12 0 en to the back and shaped to fit over the p orwardly projecting portions of the bar 8 and the blade 9 to abut against the forward end of the plate 3. The teeth are removably mounted in position by bolts 13, which take the place of certain ones of the bolts 10, since they must be somewhat longer.

The forward edges of the side plates 4 project ahead of the blade somewhat and are formed with a vertical convex curve starting at the blade as shown. Fixed on the lower portion of the curved edges and projecting ahead of the same are blades 14, whose cutting edges have the same curvature as that of the side plates. When the bottom plate 3 is tilted upwardly therefore as is necessary to place the bowl in a digging position, the vertical blades 14 will engage the ground ahead of the main blade 9, and will make definite cuts in the ground at the side edges of said blade 9. Not only is the digging facilitated by the additional cuts thus made, but the dirt as scraped up is more definitely confined between the sides of the bowl and loss of such dirt by passing to the outside as the bowl digs and loads is lessened.

Arranged to follow the contour of the forward edges of the side plates and to lit therebetween when the bowl is raised at its front end a certain distance is the front endgate 15, having rearwardly extending arms 16 pivoted on thesides of the bowl as by bolts B. The gate is suspended from chains 17 which prevent the gate from being lowered beyond a 95 certain level'without interfering with its upward movement.

The rear endgate 5 isprovided with side wings 18 which fit inside and are pivoted on the sides of the bowl in connection with the 109 arms 16; said bolts being dis osed substantially central of the area on t e side plates.

This arrangement permits a relatively wide opening movement of the rear endgate to be had while reducing the longitudinal space necessary for such opening movement over what was the case with the previous construction. This bowl is hung in place by forwardly extending pull bars 19 pivoted on the sides of the bowl and on the frame ahead of the same, and by suspension arms 20 pivoted on the sides of the bowl at its rear end as on the frame structure above the bowl. Raising and lowering of the front end of the bowl,

or the tilting of the same which controls the di ing transporting or dumping positions is ciintrblled by suitable-means such as that shown in my co-pending application, Serial No. 546,985, filed June 26, 1931. This structure comprises cables 21 depending from drums 22 mounted on the frame above the bowl and rotated by suitable mechanism which forms no part of the invention. The cables pass about sheaves 23 secured on the sides of the bowl ahead of the connection of the bars 19 with the same, and thence upward to an anchorage on the front endgate 15.

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention what I claim as new and useful and desire to se- 1 cure by Letters Patent is:

1. A scraper bowl including bottom and side plates, a rear'endgate for the bowl, side members on the endgate extending forwardly inside the side plates, a front endgate for the bowl, arms projecting rearwardly from the front gate, and means pivoting said arms and members in common on the sides of the bowl for independent swinging movement.

2. A scraper bowl having a bottom plate, a

cross beam on and above the plate at its rear end, and a plate sloping downwardly and forwardly from the top of the beam to a junction with the bottom plate ahead of the beam.

3. A scraper bowl including a bottom plate,

' a cross beam extending across and secured to said plate at its rear end, and an auxiliary late secured to the bottom plate ahead of the am and sloping thence to and secured to the outer face of the cross beam.

In testimony whereof I afiix my signature.

CHARLES E. BALL. 

